Guiding frame of the belts for the high draft mechanisms



I Sepf.28, 1937. I RCASABLANCAS 2,094,229

GUIDING FRAME OF THE BELTS FOR THE HiGH DRAFT MECHANISMS Filed 001;. a, 1935 Patented Sept. 28, 1937 GUIDING FRAME OF THE BELTS FOR THE 7 HIGH DRAFT MECHANISMS Fernando Casablancas', Saliadell, Spain Application October 3, 193a, Serial'No. 692,049

I In Spain October 11, 1932 9 Claims. (o1.g; 1a-1s1) In the high draft mechanisms with endless belts these endless belts are generally arranged to be guided by means of a framework made up of two side plates which are conveniently joined 5 together, which rest upon the same intermediate cylinders which drive the belts and at the same time carry some bars or'guiding pieces for the loop or front curve of the belts.

In these mechanisms, the belts are driven by the back part of the cylinders, whilst on their front part they rub against the bars which serve them as a guide, in such a way that the two horizontal branches of the belts through which the sliver passes are submittedin a certain way to a compression force and this results that in many cases the belts have a tendency to bend or curve themselves in the part included between the back cylinders and the front bars or guiding elements and cease to exert in this part a pressure or convenient retention on the sliver.

This curving of the horizontal branch of the belts is produced sometimes by .the two belts curving downwards and others .curving upwards, but remaining togetherand also it may occur sometimes that one of the belts curves downwards and the other upwards with which the sliver not only is not duly guided in the right direction, but in addition in all the space included between the cylinders that guide the belts and the front guide bars, the sliver is not fastened or held by the belts, and in this way there disappears the base of the high draft system which consists precisely in the retention of the fibres in all their length.

In these cases there is produced a defective working of the apparatus, a faulty guidance of the sliver towards the drawing cylinders and an irregular retention of the fibres.

In order to avoid this curvature of the belts and the defects occasioned in the working of the mechanism, there has been already tried the arrangement of placing in the guide frame of the belts a cross plate situated below the lower belt and which serves as a support to this belt. This arrangement completely avoids the displacement of'the two belts, but has not been able to be used in practice because in order to be able to mount the framework in the spinning machine it is necessary to make this cross plate removable and not only is it very difficult to place this plate every time in its proper position but in addition there is the danger of the operator forgetting to place the plate properly after having fitted there is assured that the belts shall not deviate from the right line they should follow and at the same time this does notimpede in the least the operation of placing and removing the framework.

This improvement consists briefly in arranging on the interior face of the side plates of the framework one or more projecting parts which serve as rest or guide to the belts, supporting same only by the upper or lower face of the edge but leaving free the central part of the belt.

These buffers or projecting parts maybe arranged in such a way that they serve as a rest support or guide simultaneously to the two =belts, arranging in each one of the side plates of the framework a projection underneath. the lower belt and another over the top belt, but in the majority of cases it is sumcient to arrange a projection under the lower belt or alternatively over the top belt in order that both belts are guided and do not deviate from the rightv track.

In the attached drawing there is shdwn an embodiment of the invention. Figures 1, 2 and 3, are sections of the part of the high draft mechanism which includes the framework with the belts, the cylinders which drive same and the guiding bars, showing the three ways in which the belts deviate from their correct track if the improvement of this invention is not applied. "*7

Figure 4 is a, similar section of a framework with the improvement of this invention applied to the lower endless belt.

Figure 5 is a view from above of this frame: work. Fig. 6 is a section of a framework with the improvement of this invention applied to both endless belts, and Figure 7 is a section of a framework with the improvement of this invention applied to the upper endless belt. I

In Figures 1, 2 and 3, the numeral 1 represents the framework formed in the manner already known by the two side plates joined together by cross reinforcing pieces I, 8. This framework rests on the lower cylinder 3 and fits in the journals of the top cylinder 2 and these cylinders are those which give movement to the belts 4, 5, which on their front part are guided by two bars 6 which are joined together forming a piece in the shape of a U as already known.

This arrangement of the guide bars joined together in the shape of a U, has been shown only .as an example, but as is understood the bars or guide pieces of the belts may adopt any other appropriate arrangement and this invention is applicable to all of them.

The part of the belts 4, which takes care of the carrying of the sliver and the retention of same is that which is included between the tangent lines of the cylinders 2, 3 and the front turn of the belts in which these leave the sliver. This part of the belts moves forward from the back part by the cylinders 2, 3 and on the other hand on the front part has to bear the friction with the bars 6 which in a certain measure oppose the advance of the belts. Owing to this there results in practice that in many cases this part of the belts instead of following a straight direction as is necessary for the good guiding of the sliver, curves either downward as is seen in arranged one or more projecting parts III for guiding the edge of the belts with which these remain guided perfectly in the sense of height and do not separate themselves from the correct path.

The projections or buffers 10 may be artificial or formed integral of the same plate and it is suflicient that these protrude on the internal face of the plates of the framework in a relatively small extension (for example one or two millimetres) as it is only necessary for them to serve as a support to the edges of the belt. On the other hand these projections do not place any dimculties in the setting of the framework in the machine, as the belt by simply forcing it lightly passes between the projections.

According to what is considered more convenient in each case the two belts may be guided by arranging a projection below the lower belt and another above the top belt, as shown in Fig. 6, or there may be arranged on each plate of the framework a single projection or stop which shall serve as a support or guide to only one of the two belts. In practice it has been demonstrated that this is sufiicient as not withstanding the fact that the other belt is not really guided, it does not separate itself from the one that is guided but both follow their track completely in a straight line, as is shown in Fig. 4.

The action of these projections is so efficient that in order to guide the belts one single projection is sufllcient in one of the'plates in order that the two belts shall always work correctly. However, it is preferable to arrange for a projection in each plate to ensure that the belts shall always be guided, even though in working these may run sideways touching against one or other of the plates and losing contact with the projection of the other plate.

The most convenient arrangement in practice is that shown in Figures 4 and 5, in which there is arranged in each plate a single projection III to support from below the corresponding edge of the lower belt, as in this way it is much easier to fit up the high draft mechanism or take 0155 the framework with the top belt whenever this may be necessary.

I claim:

1. In a high draft mechanism with endless belts, comprising a framework including two lateral plates for guiding the belts, and projecting parts on the inside face of the said lateral plates to prevent the displacement in a vertical .sense of the belts, said projections engaging solely the edge of the same and leaving free the central part of the belts, in such a way that'the belts may be easily forced to pass between the projections on placing the framework in the machine.

2. In a high draft mechanism as per claim 1,.

the arrangement in the inside face of the plates of the framework of two projections, one arranged below the upper run of the lower belt and the other above the lower run of the top belt.

3. In a high draft mechanism provided with upper and lower endless belts for receiving the sliver and upper and lower rollers mounted adjacent one end portion of the belts to drive the same, comprising a pair of lateral plates connected together in spaced relation'to support said rollers and to guide said belts, means extending between the opposite end portion of each of said belts for holding the said end portion of the lower belt into contact with the said end portion of the upper belt, and inwardly extending projections formed integral with said lateral plates to engage only the edgesof the belts and leaving the cen tral portion of the belts free whereby the said belts are prevented from displacement in a vertical direction and are easily passed between said projections to position said belts in the machine for operating the same.

4. In a high draft mechanism provided with upper and lower endless belts for receiving the sliver with upper and lower rollers mounted adjacent one end portion of the belts to drive the same, comprising a pair of lateral plates connected together in spaced relation to support said rollers and to guide said belts, means extending between the opposite end portion of each of said belts for holding the said end portion of the lower belt into contact with the said end portion of theupper belt, and inwardly extending projections upon said lateral plates and positioned intermediate the ends of said plates to engage solely the edges of the belts and leaving the central portion of the belts free whereby the said belts are prevented from displacement in a vertical direction and are easily passed between said projections to position said belts in the machine for operating the same.

5. In a high draft mechanism provided with upper and lower endless belts for receiving the sliver and upper and lower rollers mounted adjacent one end portion of the belts to drive the same, comprising a pair of lateral plates connected together in spaced relation to support said rollers and to guide said belts, means extending between the opposite end portion of each of said belts for holding the said end portion of the lower belt into contact with the said end portion of the upper belt, and an upper and a lower inwardly extending projection upon each of said lateral plates, the said projections positioned intermediate the ends of the plates in spaced relation and forming restricted passageways for engaging the edges of the lower run of the upper belt and the upper run of the lower belt without contacting with the central portion of either belt whereby the said belts are prevented from displacement in a vertical direction and are readily guided through said passageways to assemble said belts in the machine for operating the same.

6. In a high draft mechanism with endless belts comprising lateral plates to guide the endless belts, and supporting means for the belts projecting transversely from the plates and extending inwardly only a short distance beyond the outer edge of the belts whereby to leave the central part of the belts free.

7. In a high draft mechanism with endless belts comprising lateral plates to guide the endless belts, connecting means for the plates to hold the same spaced apart, and supporting means for the belts projecting transversely from the plates and extending inwardly slightly beyond the outer edge of the belts whereby to leave the central part of the belts free.

8. In a high draft mechanism with endless belts comprising lateral plates to guide the endless belts, and a projection on each one of the plates arranged below the upper run of the lower belt, said projection engaging only the edge of the belt and leaving the central part of the belt free in such way that the belt may be easily forced to pass between the projections.

9. In a high draft mechanism with endless belts comprising lateral plates to guide the endless belts, a single projection on each plate arranged above the lower run of the top belt, said projection being on the inside face of each plate and engaging only the edge of the belt, leaving the central part of the belt free, whereby the belt may be easily forced to pass between the projections.

FERNANDO CASABLANCAS. 

